Native: support objcExportReportNameCollisions=true binary option

This binary option makes the compiler emit a warning whenever it mangles
a name emitted by ObjCExport.

^KT-63153 Fixed

native/native.tests/testData/compilerOutput/ObjCExportDiagnostics/lib1.kt

@@ -0,0 +1,38 @@
+@file:OptIn(kotlin.experimental.ExperimentalObjCName::class)
+
+package pkg.lib1
+
+interface InterfaceClash
+class ClassClash
+
+interface InterfaceClash2
+class ClassClash2
+
+@ObjCName("InterfaceClash2")
+interface InterfaceClashWithObjCName
+@ObjCName("ClassClash2")
+class ClassClashWithObjCName
+
+class Lib1Kt
+
+enum class E {
+    ONE,
+    one,
+    @ObjCName("one")
+    TWO,
+    ENTRIES,
+    @ObjCName("values") VALUES1;
+}
+
+interface I1 {
+    val prop: Int
+    fun method()
+}
+
+interface I2 {
+    val prop: String
+    fun method()
+}
+
+fun topLevel(arg: Int) {}
+fun topLevel(arg: Long) {}

native/native.tests/testData/compilerOutput/ObjCExportDiagnostics/lib2.kt

@@ -0,0 +1,4 @@
+package pkg.lib2
+
+interface InterfaceClash
+class ClassClash

native/native.tests/testData/compilerOutput/ObjCExportDiagnostics/output.txt

@@ -0,0 +1,25 @@
+warning: name is mangled when generating Objective-C header
+    (at class ClassClashWithObjCName defined in pkg.lib1)
+warning: name is mangled when generating Objective-C header
+    (at enum entry one defined in pkg.lib1.E)
+warning: name is mangled when generating Objective-C header
+    (at enum entry TWO defined in pkg.lib1.E)
+warning: name is mangled when generating Objective-C header
+    (at fun values(): Array<E> defined in pkg.lib1.E)
+warning: name is mangled when generating Objective-C header
+    (at val entries: EnumEntries<E> defined in pkg.lib1.E)
+warning: name is mangled when generating Objective-C header
+    (at val prop: String defined in pkg.lib1.I2)
+warning: name is mangled when generating Objective-C header
+    (at fun `<get-prop>`(): String defined in pkg.lib1.I2)
+warning: name is mangled when generating Objective-C header
+    (at interface InterfaceClashWithObjCName defined in pkg.lib1)
+warning: name is mangled when generating Objective-C header
+    (at class ClassClash defined in pkg.lib2)
+warning: name is mangled when generating Objective-C header
+    (at interface InterfaceClash defined in pkg.lib2)
+warning: name "TOCEDLib1Kt" is mangled when generating Objective-C header
+warning: name "Lib1Kt" is mangled when generating Objective-C header
+warning: name is mangled when generating Objective-C header
+    (at fun topLevel(arg: Long): Unit defined in pkg.lib1)
+OK